"Everybody wants to make certain that it's safe for the workers, but $300 million to renovate the Statehouse? I mean we haven't seen any plans. I think the public is getting screwed on this deal and I think we need some transparency and we have to get to the bottom of it."

The lawsuit claims the administration's actions violate the debt limitation, appropriations, and separation of powers clauses of the New Jersey Constitution.

Lesniak, who's also a candidate for governor, worries the project could cost more than $500 million.

"Governor Christie has come up with this grandiose plan and has jumped through hoops to avoid any public scrutiny or a vote by the legislature. We're going to have to stop this waste of taxpayer dollars when we have so many other needs in the state that are more important."

The Senators hope their lawsuit will prevent the bond sales needed for the work until lawmakers hold hearings and vote on it.